package com.pig4cloud.pigx.common.core.util.wechat;

import com.pig4cloud.pigx.common.core.util.R;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;

public class GetOpenIdUtil {

	/**
	 * 小程序获取OpenId
	 * @param appid
	 * @param code
	 * @param secret
	 * @return
	 */
	public R getWechatOpenId(String appid, String code, String secret) {
		BufferedReader in = null;
		// appid和secret是开发者分别是小程序ID和小程序密钥，开发者通过微信公众平台-》设置-》开发设置就可以直接获取，
		String url = "https://api.weixin.qq.com/sns/jscode2session?appid=" + appid + "&secret=" + secret + "&js_code="
				+ code + "&grant_type=authorization_code";
		try {
			URL weChatUrl = new URL(url);
			// 打开和URL之间的连接
			URLConnection connection = weChatUrl.openConnection();
			// 设置通用的请求属性
			connection.setConnectTimeout(5000);
			connection.setReadTimeout(5000);
			// 建立实际的连接
			connection.connect();
			// 定义 BufferedReader输入流来读取URL的响应
			in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
			StringBuffer sb = new StringBuffer();
			String line;
			while ((line = in.readLine()) != null) {
				sb.append(line);
			}
			return R.ok(sb.toString());
		}
		catch (Exception e) {
			// throw new RuntimeException(e);
			R.failed(e);
		}
		// 使用finally块来关闭输入流
		finally {
			try {
				if (in != null) {
					in.close();
				}
			}
			catch (Exception e2) {
				e2.printStackTrace();
			}
		}
		return null;
	}

}
